This news wasn't all that surprising given Tesla's recent proposal to buy SolarCity, a solar company of which Musk is the chairman. SolarCity's CEO, Lyndon Rive, also happens to be Musk's cousin.

At the time, Musk called the deal "Blindingly obvious" and since then he has remained confident that the board will eventuallyapprove the almost $3 billion deal. Nevertheless, he argued his point further in the blog post stating that Tesla can't make a truly seamless solar product if it remains seperate from SolarCity.

"That they are separate at all, despite similar origins and pursuit of the same overarching goal of sustainable energy, is largely an accident of history. Now that Tesla is ready to scale Powerwall and SolarCity is ready to provide highly differentiated solar, the time has come to bring them together," he said.

Tesla will launch at least two more vehicles, in addition to the Model 3.

REUTERS/David McNew

The Model 3 is just the beginning of Tesla's venture into mass market cars. The company has plans to launch at least two more vehicles: an SUV and a truck, Musk said.

"Today, Tesla addresses two relatively small segments of premium sedans and SUVs. With the Model 3, a future compact SUV and a new kind of pickup truck, we plan to address most of the consumer market," Musk said in the blog post.

"I can’t say too much about the new products and the things we are developing, but from a pure technology point of view, everything that we’ve done on vehicles translates directly into trucks," he said. "There’s no reason that today you can’t make a very compelling electric truck."

Tesla is also working on an electric heavy-duty truck and a fully autonomous electric bus, both of which could be unveiled as early as next year!

Stephen Lam/Reuters

Musk said Tesla is also currently working on an electric heavy-duty truck and an electric vehicle for urban transport.

"Both are in the early stages of development at Tesla and should be ready for unveiling next year," he said in the blog post. "We believe the Tesla Semi will deliver a substantial reduction in the cost of cargo transport, while increasing safety and making it really fun to operate."

"With the advent of autonomy, it will probably make sense to shrink the size of buses and transition the role of bus driver to that of fleet manager," he said in the blog post.

"Traffic congestion would improve due to increased passenger areal density by eliminating the center aisle and putting seats where there are currently entryways, and matching acceleration and braking to other vehicles, thus avoiding the inertial impedance to smooth traffic flow of traditional heavy buses."

Musk also noted that Tesla's bus would take passengers all the way to their destination and that "fixed summon buttons" would be installed at bus stops for those who don't have a phone. He added the design of the bus will also accomodate wheelchairs, strollers, and bikes.

Tesla is going to make its cars incredibly safe via autonomous driving, which Musk says will be "10 times safer" than it already is.

In short, Musk wants Autopilot to get a whole lots better in the near-term.

"As the technology matures, all Tesla vehicles will have the hardware necessary to be fully self-driving with fail-operational capability, meaning that any given system in the car could break and your car will still drive itself safely," Musk said in the blog post.

"It is important to emphasize that refinement and validation of the software will take much longer than putting in place the cameras, radar, sonar and computing hardware."

Musk was careful to note that while Tesla's self-driving software is "highly refined and far better than the average human driver," its fully autonomous tech will still take some time to roll out everywhere because reguators will have to approve it first.

"We expect that worldwide regulatory approval will require something on the order of 6 billion miles (10 billion km). Current fleet learning is happening at just over 3 million miles (5 million km) per day," he said.

And last, but not least, Tesla will launch a service to let people make money off their cars when they're not using them, in what's called a "Shared Fleet" program.

"You will be able to add your car to the Tesla shared fleet just by tapping a button on the Tesla phone app and have it generate income for you while you're at work or on vacation, significantly offsetting and at times potentially exceeding the monthly loan or lease cost," Musk said in the blog post.

"This dramatically lowers the true cost of ownership to the point where almost anyone could own a Tesla," Musk said.